Waveshare RM500U-CN 5G HAT for Raspberry Pi Quad Antennas LTE-A Multi Band 5G/4G/3G

Involving or operating across two or more bands, particularly wavelength or frequency bands, a multiband radio exemplifies this capability.

A multiband antenna is designed to operate across multiple frequency bands. Its design includes different parts of the antenna being active for different bands.

A mobile phone that supports the four major GSM frequency bands (850/900/1800/1900 MHz) is known as a multiband phone. This makes it compatible with all major GSM networks globally. The 850/1900 MHz bands are primarily used in the US, while the 900/1800 MHz bands are prevalent in most other countries.

In conclusion, this paper proposes a multiband antenna for LTE/GSM/UMTS band operations. The proposed antenna, comprising the MPIFA and a folded-loop antenna, features four resonant frequencies and provides a wide 6 dB return loss bandwidth in both the low and high bands.